Vodafone 785 Smart 4 mini

[Rubbish2015]

I cant make or receive calls since this morning. The phone goes blank when I try to make a call or receive one. The call doesnt get logged into my call log either. What should I do?

[BandOfBrothers]

Does this happen everywhere or at home ?

Can you please check if you've not already done so what the Vodafone Network Mast Status Checker is reporting for your area.
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Your masts may show as OK so Please also use the Zoom out feature in the map to check surrounding masts for issues.
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https://www.vodafone.co.uk/explore/network/uk-coverage-map/index.htm

Try turning the phone Off , remove sim and wipe it and re insert and turn it back On to reset connection. 

Tips. 

Can you try your sim in another phone as a process of elimination. 

Check with Vodafone that you have no restrictions placed on your account. 

[AnnS]

@Rubbish2015

It sounds like there is a problem with your phone.  

The first thing to do is to try the SIM in an alternative phone.  If this is not convenient, take the phone into a Vodafone Store, the staff will be able to test the phone and, if necessary, arrange for a repair.